2001 年度実績報告書

実用温度範囲の広いリラクサ系圧電単結晶振動子の開発

研究課題

研究課題/領域番号	12555086
研究機関	岐阜大学
研究代表者	安田直彦岐阜大学, 工学部, 教授 (90021625)
研究分担者	林浩司岐阜大学, 工学部, 助教授 (00238106) 山下洋八株式会社東芝, 研究開発センター, 主任研究官大和英弘岐阜大学, 工学部, 助手 (70270973) 藤田一彦岐阜工業高等専門学校, 助教授 (40249793) 石橋善弘愛知淑徳大学, ビジネスコミュニケーション研究所, 教授 (00023052)
キーワード	圧電単結晶 / 圧電振動子 / インジウムニオブ酸チタン酸鉛 / モルフォトロピック相境界 / 高いキュリー温度 / イッテルビウムニオブ酸チタン酸鉛 / 電気機械結合係数 / 熱分析
研究概要	複合ペロブスカイト型圧電単結晶Pb(In_<1/3>Nb_<2/3>)O_3-PbTiO_3(PIN-PT)系の育成をフラックス法で行い、得られた単結晶試料が医療画像用振動子材料として重要な電気機械結合係数k_<33>^78%を有することを見出し、この値は250度以上の高いキュリー温度(Tc)を有する圧電単結晶材料の内では最も大きな電気機械結合係数k_<33>^である。更にこの電気機械結合係数k_<33>^*の温度特性が200度までの高温で僅か5%しか減少しないことを見出した。これは現在実用化の最も進んだ圧電単結晶材料Pb(Zn_<1/3>Nb_<2/3>)O_3 -PbTiO_3の有効温度範囲85度を遥かに凌いでいる。また設備備品である熱分析装置TGA-DTAを用い融解曲線を調べ、高温X線回折法を用いて、ペロブスカイト相の温度に伴う安定性等の熱力学的考察からPIN-PT圧電単結晶がPb(Mg_<1/3>Nb_<2/3>)O_3 -PbTiO_3型の合致溶融化合物である事を見出した。この様な熱力学的データを基に、フラックス法よりも再現性において優れた、実用的ブリジマン法を用いてPIN-PT圧電単結晶の育成に初めて成功した。更に、PIN-PTのTcよりも更に高いPZT並のTc温度を有する圧電単結晶材料Pb(Yb_<1/3>Nb_<2/3>)O_3-PbTiO_3(PYN-PT)の育成にもフラックス法を用いて成功した。まだ組成もモルフォトロピック相境界近傍の一部でしかないが、今後のブリジマン法への展開と併せて、3次元医療動画像分野への基本圧電材料の一つとしての貢献が期待される。

研究成果
(17件)

すべてその他

すべて文献書誌 (17件)

[文献書誌] N.Yasuda et.al.: "Crystal growth and dielectric properties of solid solutions of Pb(Yb_<1/2>Nb_<1/2>)O_3-PbTiO_3 with a High Curie Temperature near a Morphotropic Phase Boundary"Jpn.J.Appl.Phys.. 40. 5664-5667 (2001)
[文献書誌] N.Yasuda et.al.: "Crystal growth and electrical properties of lead indium niobate - lead titanate binary single crystal"J.Crystal Growth. 229. 299-304 (2001)
[文献書誌] N.Yasuda et.al.: "Dielectric and Piezoelectric Properties of Lead Indium Niobate-Lead Titanate Single Crystals with High Curie Temperature near Morphotropic Phase Boundary"Ferroelectrics. (2001)
[文献書誌] H.Ohwa et.al.: "Raman Scattering in(1-x)Pb(Mg_<1/3>Nb_<2/3>)O_3-xPbTiO_3"J.Phys.Soc.Jpn.. 70. 3149-3154 (2001)
[文献書誌] M.Iwata et.al.: "Raman Scattering in the Pb(Zn_<1/3>Nb_<2/3>)O_3-PbTiO_3 Mixed Crystal System II"Jpn.J.Appl.Phys.. 40. 5819-5822 (2001)
[文献書誌] M.Iwata et.al.: "A Raman Study of Phase Transitions in the Pb(Zn_<1/3>Nb_<2/3>)O_3-PbTiO_3 System"Ferroelectrics. (2001)
[文献書誌] M.Iwata et.al.: "Raman Scattering study in relaxor mixed crystals Pb(Zn_<1/3>Nb_<2/3>)O_3-PbTiO_3"Ferroelectrics. (2001)
[文献書誌] N.Yasuda et.al.: "On Fatigue and Imprint in Engineered Domain Configurations For Lead-based Complex Perovskite Compounds with High Curie Temperature near Morphotropic Phase…"1^<st> International Meeting on Ferroelectric Randam Access Memories. FED-175. 103-104 (2001)
[文献書誌] N.Yasuda et.al.: "Dielectric Properties of Lead Indium Niobate-Lead Titanate Single Crystals with High Curie Temperature near Morphotropic Phase Boundary"The 8^<th> Workshop on Oxide Electronics. 51 (2001)
[文献書誌] H.J.Fan et.al.: "Brillouin and dielectric studies of the phase transition in the relaxor ferroelectric Pb(Ni_<1/3>Nb_<2/3>)O_3"J.Appl.Phys.. Vol.91No.4. 2262-2266 (2002)
[文献書誌] Y.Yamashita et.al.: "Present and Future of Piezoelectric Single Crystals and the Importance of B-site Cations for High Piezoelectric Response"IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control. Vol.49No.2. 184-192 (2002)
[文献書誌] Y.Ishibashi et.al.: "On the Lattice Instability in Incommensurate Phase Transition of K_2SeO_4"J.Phys.Soc.Jpn.. 70. 3178-3179 (2001)
[文献書誌] M.Iwata et.al.: "Theory of Morphotropic Phase Boundary in Solid Solution Systems of Perovskite-Type Oxide Ferroelectrics : Engineered Domain Configurations II"Jpn.J.Appl.Phys.. Vol.40No.2A. 703-707 (2001)
[文献書誌] M.Iwata et.al.: "A Theory of Polarization Reversals near the Morphotropic Phase Boundary of Perovskite-Type Oxide Ferroelectrics"Jpn.J.Appl.Phys.. 708-712 (2001)
[文献書誌] Y.Hosono et.al.: "Crystal Growth and Electrical properties of Lead-Free Piezoelectric Material(Na_<1/2>Bi_<1/2>)TiO_3-BaTiO_3"Jpn.J.Appl.Phys.. Vol.40No.9B. 5722-5726 (2001)
[文献書誌] Y.Ishibashi: "On the 74K Transition in Hexagonal Barium Titanate"J.Phys.Soc.Jpn.. 70. 2228-2229 (2001)
[文献書誌] Y.Ishibashi: "On Elastic Anomaly at the Hexagonal-Orthorhombic Transition in Hexagonal BaTiO_3 and Ice"J.Phys.Soc.Jpn.. 70. 307-308 (2001)

2001 年度 実績報告書

実用温度範囲の広いリラクサ系圧電単結晶振動子の開発

研究代表者

安田 直彦 岐阜大学, 工学部, 教授 (90021625)

研究成果

[文献書誌] N.Yasuda et.al.: "Crystal growth and dielectric properties of solid solutions of Pb(Yb_<1/2>Nb_<1/2>)O_3-PbTiO_3 with a High Curie Temperature near a Morphotropic Phase Boundary"Jpn.J.Appl.Phys.. 40. 5664-5667 (2001)

[文献書誌] N.Yasuda et.al.: "Crystal growth and electrical properties of lead indium niobate - lead titanate binary single crystal"J.Crystal Growth. 229. 299-304 (2001)

[文献書誌] N.Yasuda et.al.: "Dielectric and Piezoelectric Properties of Lead Indium Niobate-Lead Titanate Single Crystals with High Curie Temperature near Morphotropic Phase Boundary"Ferroelectrics. (2001)

[文献書誌] H.Ohwa et.al.: "Raman Scattering in(1-x)Pb(Mg_<1/3>Nb_<2/3>)O_3-xPbTiO_3"J.Phys.Soc.Jpn.. 70. 3149-3154 (2001)

[文献書誌] M.Iwata et.al.: "Raman Scattering in the Pb(Zn_<1/3>Nb_<2/3>)O_3-PbTiO_3 Mixed Crystal System II"Jpn.J.Appl.Phys.. 40. 5819-5822 (2001)

[文献書誌] M.Iwata et.al.: "A Raman Study of Phase Transitions in the Pb(Zn_<1/3>Nb_<2/3>)O_3-PbTiO_3 System"Ferroelectrics. (2001)

[文献書誌] M.Iwata et.al.: "Raman Scattering study in relaxor mixed crystals Pb(Zn_<1/3>Nb_<2/3>)O_3-PbTiO_3"Ferroelectrics. (2001)

[文献書誌] N.Yasuda et.al.: "On Fatigue and Imprint in Engineered Domain Configurations For Lead-based Complex Perovskite Compounds with High Curie Temperature near Morphotropic Phase…"1^<st> International Meeting on Ferroelectric Randam Access Memories. FED-175. 103-104 (2001)

[文献書誌] N.Yasuda et.al.: "Dielectric Properties of Lead Indium Niobate-Lead Titanate Single Crystals with High Curie Temperature near Morphotropic Phase Boundary"The 8^<th> Workshop on Oxide Electronics. 51 (2001)

[文献書誌] H.J.Fan et.al.: "Brillouin and dielectric studies of the phase transition in the relaxor ferroelectric Pb(Ni_<1/3>Nb_<2/3>)O_3"J.Appl.Phys.. Vol.91No.4. 2262-2266 (2002)

[文献書誌] Y.Yamashita et.al.: "Present and Future of Piezoelectric Single Crystals and the Importance of B-site Cations for High Piezoelectric Response"IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control. Vol.49No.2. 184-192 (2002)

[文献書誌] Y.Ishibashi et.al.: "On the Lattice Instability in Incommensurate Phase Transition of K_2SeO_4"J.Phys.Soc.Jpn.. 70. 3178-3179 (2001)

[文献書誌] M.Iwata et.al.: "Theory of Morphotropic Phase Boundary in Solid Solution Systems of Perovskite-Type Oxide Ferroelectrics : Engineered Domain Configurations II"Jpn.J.Appl.Phys.. Vol.40No.2A. 703-707 (2001)

[文献書誌] M.Iwata et.al.: "A Theory of Polarization Reversals near the Morphotropic Phase Boundary of Perovskite-Type Oxide Ferroelectrics"Jpn.J.Appl.Phys.. 708-712 (2001)

[文献書誌] Y.Hosono et.al.: "Crystal Growth and Electrical properties of Lead-Free Piezoelectric Material(Na_<1/2>Bi_<1/2>)TiO_3-BaTiO_3"Jpn.J.Appl.Phys.. Vol.40No.9B. 5722-5726 (2001)

[文献書誌] Y.Ishibashi: "On the 74K Transition in Hexagonal Barium Titanate"J.Phys.Soc.Jpn.. 70. 2228-2229 (2001)

[文献書誌] Y.Ishibashi: "On Elastic Anomaly at the Hexagonal-Orthorhombic Transition in Hexagonal BaTiO_3 and Ice"J.Phys.Soc.Jpn.. 70. 307-308 (2001)

2001 年度実績報告書

安田直彦岐阜大学, 工学部, 教授 (90021625)